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Final

# lab8final1.doc

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School
York University
Department
Engineering
Course
ENG 2130
Professor
all
Semester
Winter

Description
YORK UNIVERSITY Faculty of Engineering ENG 2120 / EATS 2620 FUNDAMENTALS OF SURVEYING: LAB 8 Submitted to Prof. Wang Jian-Guo York University, Ontario Abstract: This lab focuses on learning the skills on how to apply basic principles of topographic surveys to topographic mapping and getting to know the field procedures in this matter. This lab was basically a long 1 part lab which involved taking point measurements using the Total Station instrument. We were guided outside by the TA and were advised to choose a location to set up the instrument that would minimize the interference with the “Traffic” and that is convenient in order to see as many points as possible. The next step was to accurately level the instrument and measurement of the instrument height was followed using a tape. We sighted a characteristic reference point and also set the horizontal circle reading to zero. The points for each student was identified and sketched. One of the team members was holding the target on those points and we started taking our measurements of the slope distance, zenith angle and horizontal angle at each point. The target height was also measured. Each student was doing 20 points so our points were total of 100 points. Introduction: The intention of this lab is to familiarize students with the skills of topographic surveying and mapping and also practicing the skills on an actual outdoor field. The measuring instruments used in this lab are the Total station instrument used in a lot of previous labs, tripod for setting up the instrument on it and a reflector used as a target. Total stations are Objectives: To apply the principles of topographic surveys to topographic mapping in order to gain the experience of field procedures of topographic mapping. Procedures: We practiced real topographic surveys outdoors. We made the decision on the accuracy of the observation, the density of the points etc. the area to be surveyed was identified by the TA and there was a certain degree of overlap in the areas and it is expected that only one station with arbitrary coordinates and elevation and a known orientation will be needed. Each team established a reference station in such a way as to minimize interference with the “traffic” but at a convenient location to be able to “see” as many characteristic points as possible. The instruments must be set up and levelled accurately. Once this was done, the instrument height was measured using a tape. Subsequently a characteristic reference point was sighted and the horizontal circle reading was set to zero. The second reading was reversed mode taken. Frequent checks of the zero setting were
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